<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        var num = 20;
        let gwj = 50;
        // 判断是奇数还是偶数
        if (num % 2 === 0) {
            console.log("偶数");

        }
        else {
            console.log("奇数");

        }
        // 三目运算符（三元运算符）
        var result = num %2 === 0 ? "偶数" : "奇数"
        console.log(result);
        

        let wj = gwj %2 === 0 ? "偶数" : "奇数"
        console.log(wj);
        
        
    </script>
</body>

</html>